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Finding the Fourth Proportional to 99,368.85, 137,130.78 and 54,047.82

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Solution

The fourth proportional to 99,368.85, 137,130.78 and 54,047.82 is: 74,586.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,368.85 : 137,130.78 = 54,047.82 : x
  2. Step 2: Convert to fraction form
    99,368.85/137,130.78 = 54,047.82/x
  3. Step 3: Cross multiply
    99,368.85x = 137,130.78 × 54,047.82
  4. Step 4: Simplify right side
    99,368.85x = 7,411,619,713.90
  5. Step 5: Solve for x
    x = 7,411,619,713.90/99,368.85
  6. Step 6: Final answer
    x = 74,586.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.